I2C Block Diagram; Figure 284. I2C Block Diagram - STMicroelectronics RM0365 Reference Manual

Inter-integrated circuit (I2C) interface
If SMBus feature is supported: the additional optional SMBus Alert pin (SMBA) is also
available.
28.4.1

I2C block diagram

The block diagram of the I2C interface is shown in
The I2C is clocked by an independent clock source which allows to the I2C to operate
independently from the PCLK frequency.
This independent clock source can be selected for either of the following two clock sources:
•
HSI: high speed internal oscillator (default value)
•
SYSCLK: system clock
Refer to
767/1080

Figure 284. I2C block diagram

Section 9: Reset and clock control (RCC)
Figure
for more details.
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284.
RM0365